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Patch antenna with peripheral parasitic monopole circular arrays

a technology of peripheral parasitic monopoly and circular array, which is applied in the direction of electrically short antennas, antennas, electrical apparatus, etc., can solve the problems of narrow bandwidth and high directivity, and still difficult to achieve the required bandwidth

Active Publication Date: 2018-04-10
NOVATEL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patch antennas have a number of noted disadvantages, including, e.g., narrow bandwidth and high directivity.
Though several technologies have been used to increase the bandwidth available to patch antennas, it is still difficult to achieve required bandwidth.
This is especially true when the substrate material and given physical size is limited.

Method used

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  • Patch antenna with peripheral parasitic monopole circular arrays
  • Patch antenna with peripheral parasitic monopole circular arrays
  • Patch antenna with peripheral parasitic monopole circular arrays

Examples

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Embodiment Construction

[0018]A patch antenna constructed in accordance with illustrative embodiments of the present invention utilizes a pin-wheel shaped surrounding monopole radiators to excite the surface wave excited by the patches. Such an antenna has several advantages over the prior art. First, an antenna made in accordance with principles of the present disclosure has a much improved bandwidth due to the coupling of the multiple surround monopole radiators. Second, a patch antenna in accordance with the principles of the present disclosure provides a reduced cross-polarization due to the surface wave current manipulation. Further, the circular polarization is improved by using multiple feeds and sequential rotationally excited spiral pin-wheel shaped surrounding radiators. Third, an antenna in accordance with the present disclosure provides beam shaping capability in that the position, shape and refractive coefficients of the surrounding radiators may be varied to change the radiation pattern.

[0019...

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PUM

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Abstract

A patch antenna with wider bandwidth, better axial ratio over the angle and controlled radiation patterns is provided. A central fixed patch antenna is surrounded with reactively or resistively loaded peripheral monopoles as surface-wave excited parasitic radiators. The surrounding monopoles may be printed on the same substrate as the patch, and may take a spiral (pin-wheel) shape.

Description

BACKGROUND OF THE INVENTION[0001]Patch antennas are often considered for use in high-performance GNSS multi-band antennas due to their planar configuration and easy integration with circuit boards. Patch antennas have a number of noted disadvantages, including, e.g., narrow bandwidth and high directivity. As patch antennas are based on planar resonators, they typically operate best at one certain frequency. Though several technologies have been used to increase the bandwidth available to patch antennas, it is still difficult to achieve required bandwidth. This is especially true when the substrate material and given physical size is limited. The patch antenna needs a certain size (typically half guided wavelength) to resonate at the operation frequency, therefore the beam-width, and consequently the radiation pattern roll-off, is often fixed using given material and technology.SUMMARY OF THE INVENTION[0002]The disadvantages of the prior art are overcome by providing a patch antenna ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01Q19/00H01Q9/04
CPCH01Q9/0428H01Q19/005H01Q3/446H01Q9/0414H01Q9/0435H01Q9/0478H01Q5/385
Inventor YANG, NINGFREESTONE, JERRY
Owner NOVATEL INC